baber/WOPTO huggingface dataset:
Patent GB-400941-A (GB)
Title: Improvements in connected with reversing lamps for motor vehicles
IPC: B60R16/00
Filed: 1932-04-27
Abstract: 400,941. Retractive switches. EVANS, C. J., 99, London Road North, Lowestoft. April 27, 1932, No. 24754/33. Divided on 387,186, [Group XXXV]. [Class 38 (v).] A plunger switch is operated by contact with a selector 15, or by the selector lever or fork, in a gear-box when moved into position to engage the reverse drive of a motor vehicle.
Patent GB-425308-A (GB)
Title: Improvements in alternating current oscillatory circuits
IPC: H03B5/10
Filed: 1933-09-07
Abstract: 425,308. Valve generating circuits. RYALL, L. E., 52, Crescent Gardens, Eastcote, Ruislip, Middlesex. Sept. 7, 1933, No. 24795. [Class 40 (v)] The degree of oscillation of a thermionic oscillator of the back - coupled type is controlled by rectified output voltage. The Figure shows a back coupled oscillator 1 in which the feed-back to the grid circuit is taken from a potentiometer comprised by resistance 4 and the anode cathode impedance of an auxiliary valve 5 the grid bias of which is varied by rectified signal voltage from transformer 12. The tuned circuit 9, 10, and series resistance 11 are shunted across the oscillator output, the former being tuned to the signal frequency. By virtue of this rejector circuit there is no transfer of energy to the transformer 12 at the fundamental frequency and when harmonics are produced, such as by the action of the gas discharge amplitude limiter 15, corresponding variation of the impedance of valve 5 acts so as to reduce the feed back voltage of the oscillator 1. In a modification, (Fig. 2, not shown), the impedance valve 5 is shunted by a parallel tuned circuit tuned to the oscillation frequency. Modulation of the oscillator may be effected by injecting modulating potentials in series with a polarizing voltage in series with the discharge tube 15 or alternatively in the grid circuit of the valve 5.
Patent GB-659063-A (GB)
Title: Improvements in or relating to loudspeakers
Inventor: CHAPMAN ROGER
IPC: H04R1/36
Filed: 1947-09-10
Abstract: 659,063. Loud-speaker baffles. KOLSTER BRANDES, Ltd. Sept. 10, 1947, No. 24849. [Class 40 (iv)] To improve high frequency response and diffusion, the aperture 6 in a loud-speaker baffle is reduced to a slot having a width no more than half the length. As an example, for maximum diffusion up to 8 kc/s., the width is about 1¢ inches. A composite slot having a maximum width of this order may be used, Fig. 5 (not shown).
Patent GB-299961-A (GB)
Title: Improved means for protecting blouses, coats and other garments when suspended on supporting devices
IPC: A47G25/54
Filed: 1927-09-21
Abstract: 299,961. Steptoe, W. J. Sept. 21, 1927. Dust coverings. - A paper envelope has an opening 8 in its upper edge to accommodate a garment hook or collar loop, the opening being reinforced by a strip 9 of stout material which may be folded over and divided into flaps a, b, to facilitate the insertion of the garment hanger. Alternatively, a separate covering strip secured over the reinforcing strip may be used to form the flaps as in Fig. 5.
Patent GB-1336405-A (GB)
Title: Holographic data stores
IPC: G11C13/04
Filed: 1972-05-26
Abstract: 1336405 Holograms SIEMENS A G 26 May 1972 [7 June 1971] 24927/72 Heading G2J To increase the number of sub-holograms usable on a holographic storage plate, the recording and read-out are carried out by a system using a mirror 5 carried by a universal joint and thus capable of diverting the aperture beam through the optus 3, 4 at a variety of diffusing angles. The data is imparted to the beam at 6 and accurately obturated by displayable displacing 7. By this means, using only a single projection lens, storage capacities of 10<SP>8</SP> bits can be obtained on a plate 10 cm x 10 cm.
Patent GB-352303-A (GB)
Title: Improvements in tables
IPC: A47B3/00
Filed: 1930-08-20
Abstract: 352,303. Collapsable tables. ABBOTT, S. S., 15, High Street, Southall, Middlesex. Aug. 20, 1930, No. 24950. [Class 52 (iii).] In dismountable tables of the kind in which the legs are made in pairs and are detachable from the underframing, the legs are attached to one another by a flexible cross member by means of which they are attached to the underframing. The Figure shows in plan one end of a table comprising a top a and legs c connected by a cross member d of three-ply wood or like resilient material. The top a is mounted on a frame b with projecting corners b<1> such that the cross member d is flexed and strained when attached to the frame by a turn-button f . In the form shown, the top a is hinged to one side of the frame b, and forms with a base board, attached to the lower edges of the frame, a receptacle j. A lid-supporting chain m is fitted. In a modification, the cross member d is attached to the outer parts of the legs c.
Patent GB-1152081-A (GB)
Title: Improvements in or relating to the Dispensing of Granular Materials
IPC: B65G53/00
Filed: 1966-06-06
Abstract: 1,152,081. Pneumatic conveyers. BERGWERKSVERBAND G.m.b.H. 6 June, 1966 [9 June, 1965], No. 25032/66. Heading B8A. A container 2 is provided beneath the bottom outlet 1 of a hopper and has side walls 3 arranged so that material cannot flow over them due to its natural angle of repose. Intermittent blasts of gas are fed to the base of the container 2 thereby fluidizing the material in the container and causing it to flow over the walls 3. By means of a pulse generator 9 and a solenoid-operated valve 8, the duration and frequency of the blasts of gas is controlled to cause the material to flow over the walls 3 in measured portions. In a second embodiment, Fig. 2 (not shown), a flow-tower is provided with a pair of off-set parallel inclined baffle plates and blasts of gas are fed to the lower edge of the lower plate whereby material retained thereby is caused to flow over the upper edge.
Patent GB-464135-A (GB)
Title: Improvements relating to variable gears suitable for cycles
IPC: B62M9/124
Filed: 1935-09-10
Abstract: 464,135. Change-speed driving-mechanism for cycles. HEELEY, W., and BENWELL, W. F. (trading as A.B.C. CYCLE CO.). Sept. 10, 1935, No. 25149. [Class 136 (ii)] [Also in Group XXIV] Relates to change-speed gearing for pedal cycles" &c. wherein the lower stretch of a transmission chain 5, Fig. 1, engages under and over two guiding and shifting jockeys 6, 7 mounted on the ends of a lever 17 intermediately pivoted upon an axle 18, Fig. 4, which rocks and slides in a sleeve 14, Fig. 2, rigid upon a supporting bracket 11. The rockable lever 17 is actuated by a single coiled spring 22 and a Bowden connection 9, the said spring 22 being arranged concentrically of the axle 18 of the lever to operate in compression for chain shifting, and also to operate torsionally on the said lever for chain tensioning. The end 26 of the spring 22 next the bracket 11 is anchored to the bracket as shown in Fig. 1. The end 27 next the lever 17 is carried over and into a groove 28, Fig. 4, between an attachment nut 29 of the jockey 7 and the lever 17 so as to raise the lower jockey 7 and depress the upper one 6 against the chain. The pull of the Bowden wire 9 is transmitted to the flank of the lever 17 by a headed pin 20, Fig. 2, passing through the hollow axle 18. The end of the spring coil adjacent the lever 17 is positioned by ribs 23 on the lever. A suitable stud prevents the axle 18 from coming too'far out of the fixed sleeve 14.
Patent GB-743450-A (GB)
Title: Improvements in impedance converting devices employing transistors
IPC: H04B3/18
Filed: 1953-09-11
Abstract: 743,450. Telephone transmission systems. WESTERN ELECTRIC CO., Inc. Sept. 11, 1953 [Sept. 17, 1952], No. 25180/53. Class 40 (4). [Also in Group XL (c)] In an impedance converter, one of a first pair of terminals is connected to the emitter, one of a second pair to the collector and an impedance in the base circuit is fed with a phase reversed signal derived from the voltage at the second pair so that a positive impedance presented to one pair of terminals appears in negative form at the other pair. The circuit preferably employs junction-type transistors where alpha#1. A source 3 of internal impedance Zt, Fig. 1, establishes an emitter current ie which causes a collector current aie to flow, thereby establishing a voltage of alphaZtie across' the load Zt. A fraction alpha#Ztie is fed back over phasereversing transformer 10 and since, in the conducting state the emitter is substantially at base potential it follows that the impedance appearing at terminals 1, is - alpha#Zt. The turns ratio of transformer 10 is made such that alpha#=1 and the impedance at terminals 1 is the negative of that applied at terminals 2. The transformer 10 may be replaced by a second transistor 11, Fig. 2, the voltage from collector 6 being fed to the base so that a phase-reversed signal is fed out from the collector to the base 7 of the transistor 4. Since the circuit is symmetrical a push-pull input may be used, Fig. 4 (not shown), the decoupling capacitors 21, 22 then being emitted. The circuit is opencircuit stable but by applying the load at terminals 1 the negative impedance appearing at terminals 2 is such that the circuit is shortcircuit stable, Figs. 3 and 5 (not shown). The condition is described which results in the minimum temperature variation. The input and output terminals 1, 2 may be coupled over transformers to other apparatus and the power supply resistors may be replaced by choke coils. Specifications 678,993, 694,021, 700,231, [Group XL (c)], 706,858, [Group XXXVI], and 737,506, [Group XL (c)], are referred to.
Patent GB-758585-A (GB)
Title: Winding drum for tape, particularly for metal tape
IPC: B21C47/32
Filed: 1954-08-31
Abstract: 758,585. Winding webs. HILGER, O., and BUSCH, W., [trading as BERGISCHE STAHLINDUSTRIE]. Aug. 31, 1954 [April 1, 1954], No. 25254/54. Class 100 (1). [Also in Group XXII] A winding drum 1 for tape, e.g. metal tape to be exposed to heat treatment, formed with a slot 3 for the insertion of the tape end is characterized in that at least one wall 5 of the slot 3 comprises a plate secured to the drum. The plate 5, which may be of cast steel and be formed with re-inforcing ribs 9, is welded at its outer end at 6 to the drum and at its inner end is provided with a claw 7 loosely surrounding a pin 8 attached to the drum to allow thermal expansion of the plate. The plate 5, which is slightly curved so that the slot 3 flares towards its outer end, may be provided with expansion slits 10, running in the direction of the tape, and may comprise several pieces lying side by side.
Patent GB-735318-A (GB)
Title: Improvements in or relating to spanners
IPC: B25G1/04
Filed: 1952-10-09
Abstract: 735,318. Spanners. WOOD, A. C., and AVENT, A. G. Jan. 8, 1954 [Oct. 9, 1952], No. 25299/52. Class 61. A spanner having an extensible handle to provide adjustable leverage comprises a head 2 having a shank 5 and a tubular handle 8 longitudinally slidable with respect to the shank but frictionally held against unintentional movement. The shank 5 of flattened H-shaped cross-section, has a central longitudinal recess 6 which terminates in a rim 7. The handle 8 consists of two substantially C-shaped channel members welded or brazed longitudinally. A leaf spring 13 is secured to the inside of the handle, the spring lying in the recess 6 whilst bearing against the shank. In the fully extended position, the end 16 of the spring abuts against the rim 7. The Provisional Specification describes also a hollow handle having, on the inside, ratchet teeth down one or both sides which may engage with ratchet teeth on one or both sides of the shank to lock the parts together.
Patent GB-203909-A (GB)
Title: Improvements relating to press guards
IPC: F16P3/06
Filed: 1922-09-19
Abstract: 203,909. Gray, J. Sept. 19, 1922. Guards; guards, controlling.-In press guards of the type in which a shield is caused to swing in front of the tools during each operative movement thereof, an extension pivoted to the shield is arranged to slide over the table or work, or along a guide attached to the table, so preventing the operator's hand from being trapped beneath the shield. A shield a, actuated by a striker i and cam and returned by a spring j, is provided with a pivoted extension b carrying a roller e and held by a a spring d in contact with the table c or the work. The roller may be replaced by a pivotal connection with a bush slidable on an horizontal guide bar. Duplicate actuating- mechanism and a pair of outwardly-swinging shields, combined with a stationary central guard, may be employed.
Patent GB-673113-A (GB)
Title: Improvements in or relating to mountings for blades of wind motors or of propellers or of helicopter rotors
IPC: B64C27/54
Filed: 1949-10-03
Abstract: 673,113. Helicopters. BROWN & CO., Ltd., J., MENSFORTH, T., and POUNCEY, H. Oct. 3, 1950 [Oct. 3, 1949], No. 25410/49. Class 4. [Also in Group XXVI] In a mounting for the blades of a helicopter rotor of the kind in which a limited degree of freedom of swinging movement is permitted for each blade abount one or more axes transverse to the longitudinal axis of the blade, a member; pivotally attached to the blade root or to a part attached to the root is slidably mounted in a socket attached to the rotor hub and urged inwardly by resilient means, the socket and the root or the part being so shaped that, when brought into mutual contact at the inner limit of travel, they restrain the pivotal movement. Each blade 10 is carried by a tubular support 16 which is rotatably mounted on a stub shaft 17. Variation of the blade pitch is carried out by a hydraulic or pneumatic motor 31 which is connected by linkage 30 to a shaft 28 which is connected by universal joints 23, 26, a splined shaft 25 and gearing 20, 21 to the support 16. To permit the blade 10 to pivot about an axis parallel to the axis of rotation of the rotor and about a further axis tangential to a circle of revolution, the stub shaft 17 is formed with one fork 32 of a universal joint the other fork of which is carried by a cylindrical member 39 which is slidable in a cylindrical guide 40 fixed to an arm 11. Blocks 41 carried by the member 39 engage slots 42 formed in the guide 40, and carry pegs 45 to which is pivotally attached a member 47. The latter is attached by links 49 to springs 51 which are anchored to a plate 52. The required spring tension is obtained by drawing the plate 52 inwardly by means of a chain 55 which encircles a sprocket 56 which can be turned by a key applied to a square portion 58 of the sprocket spindle. When the rotor is stationary or only rotating at a slow speed, the springs 51 draw the blades inwardly so that a curved portion 61 of each shaft 17 seats on a resilient seating 62 and pivotal movement is consequently prevented. A bearing 64 for the shaft 28 slides in a slideway 67 and is moved radially in unison with the blade 10 by engagement with a peg 44 carried by one of the blocks 41. The resultant relative movement between the two elements of a dog clutch 29 having tapered teeth controls the amount of backlash between the elements. Thus, there is a positive drive when the blade 10 is in its normal running position, but when the blade is in its retracted position the backlash is sufficient to permit it to take up any position within limits. To enable the blade to take up a feathered position, its longitudinal axis of rotation is displaced from the centre of pressure by, say, one inch. According to the Provisional Specification, a lever arm engaging a lug carried by the blade root is used instead of the gearing 20, 21.
Patent GB-362355-A (GB)
Title: Improvements in or relating to apparatus for switching out faulty electric line sections
IPC: H02H1/00
Filed: 1930-08-27
Abstract: 362,355. Protective cut-out arrangements. SIEMENS-SCHUCKERTWERKE AKT.-GES., Siemensstadt, Berlin. Aug. 27, 1930, No. 25583. Convention date, Aug. 29, 1929. [Class 38 (v).] A protective arrangement for cutting out a doubleearth fault on a sectionalized line having an insulated neutral, comprises a series of circuit-breakers under control of relays a .. g, each of which comprises a spring-controlled disc 1 acted on by windings 3, 4, connected, respectively, in the residualcurrent circuit of current transformers 5, 6, 7 in the lines R. S, T, and to series-connected secondaries 12, 13, 14 of potential transformers having an earthed neutral 11. In the event of a doubleearth fault occurring at I, II in the lines S, T, Fig. 2, the appropriate windings 20 of relays c, d, e will close their contacts 19 to energize coils 17 which unlock the discs 1 of those relays. The out-of-balance current appears in the windings 3 of those relays, and the potential between the starpoint of the lines and earth appears in the windings 4. Owing to the phase-displacement between the current in winding 3 and the potential in winding 4 of relay e being greater than at relay d, the relay e will be the first to close its contacts 22 and trip the breaker 28, so cutting out the double-earth. The single-earth fault current remaining is not ordinarily in excess of normal working current, as it is the capacity current of the lines to earth, and even if it is in excess of such normal current, the windings 20 are made insensitive to it. It may, however, be dealt with, if desired, in other ways. A short-circuit relay 25 is also provided, but its trip circuit is opened at 26 when a disc 1 begins to move. The energization of winding 4 may, alternatively, depend on interphase voltages having fallen below a given value, and a further interlock may be provided, to be released only on excess current in more than one phase.
Patent GB-1006938-A (GB)
Title: Oil stove
IPC: F23D11/44
Filed: 1962-07-04
Abstract: 1,006,938. Vapour burners. W. BAUMANNS. July 4, 1962 [July 5, 1961], No. 25616/62. Heading F4T. A vapour burner comprises a perforated ceramic burner plate 18 supplied with oil vapour from a source of pressurized oil 10 through a vaporizing conduit 11 having an outlet nozzle 14 which discharges into a constriction 15 in an air intake pipe 16 communicating with the burner plate, and a heat exchanger 20 heated by waste gases from the burner and/or heat radiated therefrom for preheating the combustion air and/or the oil passing through the conduit 11. Auxiliary heaters such as gas flames or electric elements (not shown) are used to heat the conduit 11 during starting up. The source of pressurized oil 10 may be a gear pump or pressurized oil tank. The burner is ignited by an electrical incandescent spiral 19 located in the burner plate 18.
Patent GB-368237-A (GB)
Title: Improvements in electrical machine armature stampings
IPC: H02K1/26
Filed: 1930-08-28
Abstract: 368,237. Cores for dynamo-electric machines. BOSCH AKT.-GES., R., 4, Militõrstrasse, Stuttgart, Germany. Aug. 28, 1930, No. 25653. Convention date, Sept. 6, 1929. Void [Published under Sect. 91 of the Acts]. [Class 35.] Armature core stampings having parallel-sided slots have deep and shallow slots arranged alternately. In the form shown the slots c accommodate one conductor and the slots bare of sufficient depth for three conductors.
Patent GB-944430-A (GB)
Title: Driving means for tippers, particularly for use in mines
IPC: B65G67/00
Filed: 1960-07-22
Abstract: 944,430. Wagon tipplers. DEMAG A.G. July 22, 1960 [Aug. 14, 1959], No. 25689/60. Heading B8E. The main motor 4 driving a tippler 1 is switched-off as the tippler approaches its end position and a creep drive is then provided by a further motor 7, driving through a lower transmission ratio. In the arrangement illustrated the motor 4 drives the planet carrier 5 of an epicyclic gear the sun wheel 6 of which is driven by the motor 7, and each motor is provided with a brake applied when limit switches switch-off the motor. The final drive to the tippler 1 is through a flexible member 2.
Patent GB-749023-A (GB)
Title: Improvements in or relating to a combined heater and pump for fluids
IPC: F02N19/10
Filed: 1953-09-17
Abstract: 749,023. Fluid friction brakes. THOMPSON PRODUCTS, Inc. Sept. 17, 1953 [Jan. 29, 1953], No. 25711/53. Class 103 (1). [Also in Group XIII] A combined heater and pump unit for fluids comprises a vaned rotor 20 in the form of an impeller mounted on a shaft which is rotatable within a housing 1, and a further rotor 23 rotatably mounted on said shaft, means being provided whereby one of the rotors may be selectively braked relative to the other so that fluid entering the housing through an inlet 6 near the centre thereof will be heated by slippage and turbulence before being forced from a peripheral outlet 9 from the housing by centrifugal force. Fig. 2 shows an arrangement in which the rotor 20 is mounted on a shaft 13 driven by a pulley 18. The rotor 23 which has a hub 22, rotates freely on the shaft 13. Electromagnetic elements 25. 26 are mounted respectively on the hub 22 and in the cover 11 of the housing whereby the rotor 23 may be braked relative to the rotor 20 thus creating friction heat in the fluid pumped through the housing by the rotor 20. The braking means may alternatively comprise a friction disc brake or an electro-dynamic coupling. The braking effect is controlled by an element responsive to the temperature of the heated fluid. An arrangement is described in which the heating and pumping unit is incorporated in the cooling system of an internalcombustion engine, the heating effect being utilized to enable the engine operating temperature to be attained more rapidly on starting and also for supplementing the engine heat in a space heater, the unit being driven by the engine and the heating effect being regulated by a thermostat in the engine cooling system.
Patent GB-187125-A (GB)
Title: Improvements in or connected with miners' safety and other electric hand lamps
IPC: F21L4/00
Filed: 1921-09-29
Abstract: 187,125. Oldham, G., and Oldham, J. Sept. 29, 1921. Battery lamps.-In miners' and like safety lamps, wherein the base c of the battery receptacle is rotatable to enable the light to be switched on and off, the battery is provided with projecting lugs or keys f adapted to engage in corresponding recesses in the base c, or vice versa, whereby the battery and the base are detachably interlocked and the battery positioned with relation to the lamp contacts. Recesses g may also be provided in the base to accommodate the corners of batteries of different shapes, as indicated at h, i. The usual magnetic lock may be provided.
Patent GB-257602-A (GB)
Abstract: 257,602. Goerz Optische Anstalt Akt.-Ges., C. P. Aug. 26, 1925, [Convention date]. Plane-trigonometry calculators. - Apparatus for use in the indirect laying of ordnance comprises a graduated ring in which is mounted a pair of relatively movable discs each ruled with a set of parallel lines, the upper disc being formed of transparent material. A centrally pivoted ruler may be provided, the ruler being straight or curved to allow for the average deviation of the projectile. As shown the graduated ring 1 carries a rotatably mounted disc 2 with a set of parallel lines on its upper surface, the one through the centre having an arrowhead 2a, and a. superimposed disc 3 of celluloid with a similar set of lines, the one through the centre having an arrow head 3a. The centre spindle o, which forms a handle, serves as a support for a distance graduated rule 4 having a reading index 4a. The discs are set in accordance with the observed azimuthal directions a, # of the target and gun from the observation post and are clamped in position by set screws 5 and 6. The observed distance between the observer and gun and the known base length are set on the lines 02a, 03<a> by means of the ruler 4 whereby the gun-observer-target triangle OBZ is obtained. The range is given by the distance OZ and the lateral angle is read at the index 4<a>. The lines on the disc 2 may be in distinguishing colours or the spaces between the lines may be differently coloured. The two diameters of the discs may be graduated in distances so as to dispense with the rule 4.